documentation build fails on develop

[cz4rs]

Documentation fails to build on develop with a following error:

Traceback (most recent call last):
  File "/build/vt/m.css/documentation/doxygen.py", line 4305, in <module>
    run(state, templates=os.path.abspath(args.templates), wildcard=args.wildcard, index_pages=args.index_pages, search_merge_subtrees=not args.search_no_subtree_merging, search_add_lookahead_barriers=not args.search_no_lookahead_barriers, search_merge_prefixes=not args.search_no_prefix_merging)
  File "/build/vt/m.css/documentation/doxygen.py", line 4156, in run
    parsed = parse_xml(state, file)
  File "/build/vt/m.css/documentation/doxygen.py", line 2812, in parse_xml
    if not len(compounddef.find('briefdescription')) and not len(compounddef.find('detaileddescription')) and not compounddef.attrib['kind'] == 'group' and (not compounddef.attrib['kind'] == 'page' or is_a_stupid_empty_markdown_page(compounddef)):
TypeError: object of type 'NoneType' has no len()

Complete log: https://github.com/DARMA-tasking/vt/actions/runs/11259793975/job/31559293997 (this has been re-run with the same result).